# MarathonOS: Race Day Ready — Countdown, Pacing & Logistics

> Marathon runner's command center for race day, training, and memory logging. (iPhone/iPad app by Esteban De la Vega.)

- Source: https://appshunter.io/ios/app/marathonos-race-day-ready/id6755690767 (this page in markdown: same URL + `.md`)
- Developer: [Esteban De la Vega](https://appshunter.io/developer/1855596190)
- Category: Health & Fitness, Sports
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 35 MB
- Languages: American English
- Released: 2026-02-24
- Data updated: 2026-08-13
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/marathonos-race-day-ready/id6755690767/reviews.md

## What is MarathonOS?

YOUR RACE DAY, WORKED OUT IN ADVANCE

Training is hard enough. MarathonOS keeps the countdown, travel details, checklists, pacing, fueling, weather, race-day updates, and post-race notes in one place.

TODAY'S BRIEF
Open the app and see what needs attention now: days to go, key dates, preparation progress, race-day weather, your next checklist item, fuel plan, and goal verdict.

KNOW WHERE YOU STAND
Import runs automatically from Strava, Garmin, or Apple Health. MarathonOS turns them into a clear readiness score, training-load trends, heart-rate zones, a training heatmap, route history, and race predictions. Set a goal time to see an honest range, your late-run fade, and what could move the verdict.

PLAN YOUR PACE AND FUEL
Build a mile-by-mile or kilometer-by-kilometer pace band from your goal, distance, and strategy. Add a fueling timeline so every gel, drink, and timing cue is decided before the start.

KEEP EVERY DETAIL TOGETHER
Track flights, hotels, parking, bib pickup, expo hours, start-line directions, and other key dates. Build reusable checklists for gear, nutrition, travel, and race morning, with due dates that keep preparation moving.

RACE DAY ON YOUR HOME AND LOCK SCREEN
See your next race in a Home Screen widget. Follow the final countdown from the Lock Screen, Live Activity, and Dynamic Island, with weather, checklist progress, and a start-line wearable reminder visible when you need them.

REMEMBER THE WHOLE RACE
Save your result, splits, route, race-day conditions, notes, and what you would change next time. Race history keeps every finish and reflection together across seasons.

YOUR FIRST RACE, FULLY UNLOCKED
Creating races and connecting wearables are free. For the first race you add, unlimited checklists, travel and logistics, and that race's report are all included at no cost.

Premium adds fueling, pace bands, goal analysis, advanced readiness analytics, and unlimited checklists, logistics and race reports across every race. Choose $5.99 monthly or $39.99 annually, each with a 7-day free trial. Prefer one race cycle? Race Block provides 20 weeks of premium access for $24.99.

Readiness scores, predictions, and goal analysis are informational and are not medical advice or a substitute for a coach.

Terms of Use: https://www.42cal.com/terms
Privacy Policy: https://www.42cal.com/privacy-marathonos

## Key features

- Race day countdown and logistics
- Customizable smart checklists
- Post-race reflection and memory logging
- Proven training plan methodologies
- Advanced training analytics
- Wearable device integration

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Premium Monthly | $5.99 | per month |
| Premium Annual | $39.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Race Block Pass | $24.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/marathonos-race-day-ready/id6755690767/reviews.md

### 5/5 — Marathon training made easy!

*2026-02-26*

I’m training for a race and it has been so helpful to use the app to keep track of my plan and pre-race checklist.

## Frequently asked questions about MarathonOS

### What is MarathonOS?

MarathonOS is a dedicated command center for marathon runners, designed to manage race day logistics, training plans, and store race memories. It goes beyond simple run tracking to encompass the entire racing life experience.

### Does MarathonOS have ads?

No, MarathonOS is ad-free. The application does not display any advertisements, ensuring an uninterrupted user experience.

### What are the premium features in MarathonOS?

Premium unlocks advanced training plans, comprehensive analytics, unlimited checklists, and complete race logistics. This is available for $5.99/month or $39.99/year.

### What training methodologies are included in MarathonOS?

MarathonOS includes four battle-tested training methodologies: Fatigue First and Build Then Sharpen. These plans can be linked directly to your races with calendar synchronization.

### Can I connect my wearables to MarathonOS?

Yes, MarathonOS supports integration with Strava, Garmin, and Apple Health. New activities from these platforms sync automatically within minutes.

### How does MarathonOS help with race day preparation?

It provides a race day command center with countdowns, upcoming race details, and recent stats. It also includes a race day logistics section for flights, hotels, and parking, along with smart checklists for gear and mental prep.

### What kind of post-race data can I record in MarathonOS?

You can record pre-race notes and post-race reflections including mood, effort, and weather. It also allows for logging mile splits and what worked or didn't work, building a personal marathon knowledge base.

### What is the update frequency for MarathonOS?

The app was last updated on March 21, 2026, indicating active development. Users can expect ongoing improvements and feature additions.

## Version history (last 4 releases)

### 1.2 — 2026-08-11

MarathonOS 1.2 brings race day into focus from the first countdown to the final reflection.

• See your next race on the Home Screen and Lock Screen, with a race-morning Live Activity and Dynamic Island countdown.
• Start each day with Today's Brief: key dates, preparation progress, race-day weather, fueling, checklists, and your goal verdict in one place.
• Build a personalized pace band and fueling timeline before the start.
• Set a goal time and get an honest range, late-run fade analysis, and a clear view of what could move the verdict.
• Track bib pickup, expo hours, travel, hotels, parking, and start-line details in the redesigned race sheet.
• Save race-day conditions, results, splits, notes, and reflections in richer race reports and Race History.
• Import splits from Garmin and Apple Health alongside Strava.
• Share your race, your pace band, and your weekly progress with redesigned share cards.
• Get started with a new countdown-led onboarding flow. Your first race includes unlimited checklists, travel and logistics, and its race report at no cost.

This update also improves workout syncing, fixes stale race and progress data, and includes layout, accessibility, and reliability refinements throughout the app.

### 1.0.3 — 2026-03-21

- Granular race result splits, race route, and other stats viewable on the races tab
- See all runs corresponding to a training block in one place, summary view and individual runs
- Actual race result automatically replaces race data for a newly completed race
- Improved onboarding to get going faster
- Faster and improved Strava and Garmin activity syncing
- And minor bugs caught

### 1.0.2 — 2026-03-12

New in this update:

— Race Predictions: Projected finish times for 5K through Marathon based on your training
— Readiness Score: 0–100 score with letter grade showing race preparedness
— HR Zone Analysis: Easy/hard ratio with coaching messages and editable lactate threshold
— Training Load: Acute vs. chronic workload chart — see if you're in the sweet spot
— Workout Grades: A+ through C on every run, compared to plan targets
— Split Consistency: Gold/Silver/Bronze pacing grades with pattern detection
— Activity Heatmap: 13-week training grid with streak tracking
— Post-Run Reflection: Mood, effort, weather, and notes after every synced run
— Smoother onboarding with run import progress indicator

### 1.0.1 — 2026-02-24

No release notes.

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## More apps by Esteban De la Vega

- [FaceQuest: Skin Care Tracker](https://appshunter.io/ios/app/facequest-skin-care-tracker/id6758858233)

All apps by Esteban De la Vega: https://appshunter.io/developer/1855596190

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-13.*